The area of a triangle is given by the expression 4x + 20, in square feet. It’s height is 8 feet as shown. it’s base is an unknown in terms of the variable x. a) write the area of the triangle as the product. b) For what vale of x will the height and the base be the same length? Justify. c) check your answer to by using A=1/2b*h and by substituting it into the expression A= 4x+ 20.